2007 Fiscal Year Final Research Report Summary
Study on Direct Contact Heat Transfer from Water Droplets Dispersed in a Molten Metal Pool
| Project/Area Number |
17560751
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Energy engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
MISHIMA Kaichiro Kyoto University, Research Reactor Institute, Professor (60027472)
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| Co-Investigator(Kenkyū-buntansha) |
SHEN Xiuzhong Kyoto University, Research Reactor Institute, Instructor (20362410)
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| Project Period (FY) |
2005 – 2007
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| Keywords | neutron radiography / boiling heat transfer / liquid-liquid interface / liquid metal / fast breeder reactor / direct contact heat transfer / multiphase flow / visulalization |
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| Research Abstract |
Direct contact evaporation of a water droplet was studied in a molten-metal pool. Dynamic behavior of a two-phase bubble evaporating in molten alloy was clearly observed by using high-frame rate neutron radiography. Measurements of drag coefficient of a single two-phase bubble showed Mat the relationship between the rising velocity of a single two-phase bubble in the molten Newton's alloy was not much different from that for an ordinary one. The growth rate of a two-phase bubble was measured to determine the interfacial beat transfer coefficient in a molten alloy-water system. An empirical equation of overall heat transfer coefficient was presented for practical application.
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